A gripping, twisty thriller from Freida McFadden, the New York Times bestselling author of The Housemaid and The Coworker!

The guiltiest people aren't always the ones behind bars…

As a new nurse practitioner at a maximum-security prison, Brooke Sullivan is taught three crucial rules:

Treat all prisoners with respect.

Never reveal any personal information.

Never EVER become too friendly with the inmates.

But nobody knows that Brooke has already broken the rules. Nobody knows about her inti...